Color printing and stamping press.



PATENTED DEC. 20, 1904.

'H. FOMM. COLOR PRINTING AND STAMPING PRESS.

APPLIOATIOK FILED FEB; 19, 1904.

N0 MODEL.

n m m MN m m M UNITED STATES Patented December 20, 1904.

PATENT OFFICE.

COLOR PRINTING AND STAMPING PRESS.

SPECIFICATION forming part of Letters Patent No. 777,722, dated December 20, 1904;. Application filed February 19, 1904. Serial No. 194,406.

To all whom, it may concern/.-

Be it known that I, HANS FoMM, asubject of the German Emperor, residing at 7 Kohlgartenstrasse, Leipsic-Reudnitz, Germany, have invented certain new and useful Improvements in Color Printing and Stamping Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention,

- such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to color printing and stamping presses.

It has for its object to provide controlling mechanism for the color-cylinders in color printing and stamping presses in which the inking-rollers are mounted on a carriage and reciprocated on a track. Owing to the special construction of this device, the cylinders which are brought in contact with the form when the carriage moves outward are prevented from coming into contact with the form when the carriage moves in the opposite direction without any enlargement of the carriage-track being rendered necessary.

In connection with color printing and stamping presses the movement of the color-cylinder carriage is decidedly restrictedthat is to say, its track can only be relatively smallso that particularly in machines with large forms the particular cylinder on the carriagenamely, the first cylinderwhich has moved outward is immediately at the end of its movement in close proximity to the form, for which reason when the carriage returns the lowering of the cylinder in proper time presents great difiiculties. The lowering and raising devices hitherto employed in presses of the kind mentioned cannot prevent the color-roller when the carriage effects its outward movement from coming into contact prematurely, because in thesethe color-cylinder which is foremost in the direction of movement is put out of action and on account of the slight distance at which this cylinder stands from the form in a horizontal direction there is not sufiicient time for the shifting device to bring the cylinder intended for applying the color during the backward movement of the carriage out of reach of the form. The removal of this well-known difiiculty has always been prevented by the impossibility of enlarging the track of the color-cylinder carriage, for which reason the raising and lowering devices hitherto employed have been retained notwithstanding the defectiven ess of the colorwhich at any particular time is in front in re-' lation to the direction of the movement be brought into contact with the form and that which is behindthat is, at a considerable distance in a horizontal direction from the formbe placed out of action, for as the latter, as already mentioned, is at a considerable distance from the form in a horizontal direction there is time, notwithstanding the smallness of the carriage-track, for putting the rear cylinder out of action. Similarly-acting devices with which the rear cylinder is put out of action have already been employed in platen (or Scandinavian) printing-presses. In these devices the operating-lever is actuated by means of stops arranged at the end of the track in such a manner that the carriage must be moved out over the printing-press in both directions to the extent of the movement of the operating-lever. This kind of motion is subject to the condition of imparting a very considerable movement to the carriage, which can be effected without trouble in platen (or Scandinavian) printing presses; but presents insurmountable difficulties in color printing and stamping presses-that is, presses actuated by toggles.

In order that in color printing and stamping presses the roller which is to be put out of action may be likewise prevented from coming prematurely into contact with the printingform, the controlling device in the present invention, as already mentioned, is so constructed that the rear colorcylinder, according to the direction, of movement is put out of action, but with the difference that the distance between the said color-cylinder and the printingform is taken advantage of when putting the cylinder out of actionthat is to say, the back color-cylinder is actuated during the runningin movement of the carriage, so that no enlargement of the carriage-track is necessary. In the drawings two different ways of effecting the movement are illustrated.

Figure 1 is a side elevation of a carriage furnished with two cylinders and shown in the run-out position. Fig. 2 is a similar view of a carriage furnished with four cylinders.

In the form shown the known depressinglevers (0 a are pivoted around the bolts 2' and furnished with toothed segments 2; 2;, with which the toothed segment a of the trip-lever b engages. The trip-lever Z) pivots around the bolt 0 and has a roller mounted at its lower end, which moves in the usual manner over a rail g, adjoining the railway of the carriage (Z, the lever 5 being oscillated into one or the other oblique position, according to the direction in which the carriage is moving. The rollers are normally held up by spring-bearings. If now the carriage (Z be moved in the direction of the form is, the lever b is forced by the rail g to the left, the consequence of which is that the lever 60 is removed from the bearing of the front cylinder. On the other hand, the lever (1,, which moves downward, de-

presses the bearing of the back cylinder, and thereby puts the cylinder out of action before it can come into contact with the form is.

When the carriage runs out, the operations are reversed.

What I claim, and desire to secure by Letters Patent, is

1. In color printing and stamping presses, the combination with a reciprocating carriage having reciprocating cylinders, pivotedlevers adapted to alternately depress and put said cylinders out of action and a pivoted trip-lever adapted to engage and operate said first-mentioned levers, of a fixed rail adapted to engage and operate said trip-lever, substantially as described.

2. In color printing and stamping presses, the combination with a reciprocal carriage having reciprocal cylinders, pivoted toothed levers adapted to alternately depress and put said cylinders out of action and'a pivoted triplever for operating said first-mentioned levers provided with teeth engaging with the teeth of said levers, of a fixed rail adapted to engage and operate said trip-lever, substantially as described.

In testimony whereof I have aflixed my signature in presence of two witnesses.

HANS FOMM.

Witnesses:

I-IERM. SAoK, RUDOLPH FRIoKE. 

